Newport 1936-R series User Manual
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Newport 1936-R series User Manual

Single and dual-channel optical meters
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Model 1936-R/2936-R Series
Single and Dual-Channel Optical Meters
User's Manual

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  • Page 1 Model 1936-R/2936-R Series Single and Dual-Channel Optical Meters User’s Manual...
  • Page 2 Preface...

  • Page 3: Eu Declaration Of Conformity

    Model Number: 1936-R, 2936-R Year mark affixed: 2008 Type of Equipment: Electrical equipment for measurement, control and laboratory use in industrial locations. Manufacturer: Newport Corporation 1791 Deere Avenue Irvine, CA 92606 Standards Applied: Compliance was demonstrated to the following standards to the extent applicable: BS EN61326-1: 2006 “Electrical equipment for measurement, control and...
  • Page 4 As required, Newport will also generate a new version of this user manual, reflecting updates to the instrument. Please check the Newport website (www.Newport.com) for newer versions of the firmware and the operator manual, which can be downloaded as a PDF file.

  • Page 5: Warranty

    INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS. First printing 2008 © 2008 by Newport Corporation, Irvine, CA. All rights reserved. No part of this manual may be reproduced or copied without the prior written approval of Newport Corporation.
  • Page 6 Preservation of Secrecy and Confidentiality and Restrictions to Access: Customer shall protect the Newport Programs and Related Materials as trade secrets of Newport, and shall devote its best efforts to ensure that all its personnel protect the Newport Programs as trade secrets of Newport Corporation.

  • Page 7: Technical Support Contacts

    Newport Corporation, freight prepaid, clearly marked with the RMA# and we will either repair or replace it at our discretion. Newport is not responsible for damage occurring in transit and is not obligated to accept products returned without an RMA#.
  • Page 8 Preface IMPORTANT NOTE Before plugging the instrument into a PC via a USB communication port, please make sure that the USB Drivers are installed. Run Setup.exe from the Software CD that came with your product. The installation program will configure the PC with the 1936/2936 Series USB drivers.

  • Page 9: Table Of Contents

    Preface Table of Contents EU Declaration of Conformity ............... 3 Warranty ....................5 Technical Support Contacts ..............7 Table of Contents ................... 9 List of Figures ..................16 List of Tables..................17 Safety Precautions Definitions and Symbols ............19 1.1.1 General Warning or Caution ...........19 1.1.2 Electric Shock ..............19 1.1.3 Protective Conductor Terminal ........19 1.1.4 European Union CE Mark ..........20...
  • Page 10 Preface Startup Procedure ............... 34 Front Panel Layout ..............34 3.2.1 Front Panel Elements ............35 3.2.2 Understanding the Main Screen ........35 Rear Panel Layout ..............35 3.3.1 Elements That Vary by Model (on back panel) ....35 3.3.2 Panel Layout ..............36 3.3.3 Changing Voltage Settings ..........38 Rack Mounting the 1936/2936 Series ........
  • Page 11 Preface USB Address and RS232 Parameters ......... 55 Statistics ..................55 4.7.1 Graph ................56 Math Functions ................57 Measurement Correction Settings ..........58 4.10 59 4.11 Display Modes ................59 4.11.1 Numeric Display ..............59 4.11.2 Analog Bar ...............59 4.11.3 Analog Needle ..............61 4.11.4 Vertical Chart ..............61 4.12 Firmware Upgrade Procedure .............
  • Page 12 Preface USB Communication ..............77 Communication Command Reference Model 1936/2936 Series Remote Interface Commands ..... 79 Command Overview ..............79 8.2.1 Activate a Specific Channel ..........80 Command Description ..............80 8.3.1 Command Glossary ............80 8.3.2 Display Commands ............82 8.3.2.1 DISP:BRIGHT ............82 8.3.2.2 DISP:BRIGHT? ............
  • Page 13 Preface 8.3.3.30 PM:DETSIZE? ............92 8.3.3.31 PM:DETSN? ............92 8.3.3.32 PM:DIGITALFILTER .......... 93 8.3.3.33 PM:DIGITALFILTER? ........93 8.3.3.34 PM:DPower? ............93 8.3.3.35 PM:DS:BUFfer ............. 94 8.3.3.36 PM:DS:BUFfer? ........... 94 8.3.3.37 PM:DS:CLear ............94 8.3.3.38 PM:DS: Count? ............. 94 8.3.3.39 PM:DS:ENable ............. 95 8.3.3.40 PM:DS:ENable? ............
  • Page 14 Preface 8.3.3.69 PM:RUN ............. 105 8.3.3.70 PM:RUN? ............105 8.3.3.71 PM:SATLEVEL ..........105 8.3.3.72 PM:SATLEVEL? ..........105 8.3.3.73 PM:SPOTSIZE ........... 106 8.3.3.74 PM:SPOTSIZE? ..........106 8.3.3.75 PM:STAT:MAX? ..........106 8.3.3.76 PM:STAT:MEAN? ..........107 8.3.3.77 PM:STAT:MIN? ..........107 8.3.3.78 PM:STAT:MAXMIN? ........107 8.3.3.79 PM:STAT:SDEViation? ........
  • Page 15 Preface Introduction ................117 Analog Signal Flow ..............117 Digitized Signal Flow ............... 118 Typical Detector Signals ............119 Thermopile Detector Signals ............ 120 Pulse Energy Detector Signals ..........120 Peak-to-Peak (Photodiode) Detector Signals ......121 Integration of Detector Signals ..........122 Analog Output ................

  • Page 16: List Of Figures

    Preface List of Figures Figure 1 General Warning or Caution Symbol ..........19 Figure 2 Electrical Shock Symbol ..............19 Figure 3 Protective Conductor Terminal Symbol ........19 Figure 4 CE Mark ..................20 Figure 5 Alternating Voltage Symbol ............20 Figure 6 On Symbol ..................

  • Page 17: List Of Tables

    Model 1936/2936 Series Analog Signal Flow Diagram ....117 Figure 65 Thermopile Signals exhibit 1 to 10 second time constants..120 Figure 66 Typical Newport Energy Detector Signal Waveform ....121 Figure 67 Negative Baseline Voltage............121 Figure 68 Time Varying Signal Measurements.
  • Page 18 Preface This page is intentionally left blank...

  • Page 19: Safety Precautions

    Safety Precautions Definitions and Symbols The following terms and symbols are used in this documentation and also appear on the Models 1936/2936 Series Optical Power Meters where safety- related issues occur. 1.1.1 General Warning or Caution Figure 1 General Warning or Caution Symbol The Exclamation Symbol in the figure above appears in Warning and Caution tables throughout this document.

  • Page 20: European Union Ce Mark

    1.1.4 European Union CE Mark Figure 4 CE Mark The presence of the CE Mark on Newport Corporation equipment means that it has been designed, tested and certified as complying with all applicable European Union (CE) regulations and recommendations. 1.1.5...

  • Page 21: Fuses

    Safety Precautions 1.1.8 Fuses Figure 8 Fuse Symbol The fuse symbol in the figure above identifies the fuse location on the Models 1936/2936 Series Optical Power Meters. 1.1.9 Frame or Chassis Figure 9 Frame or Chassis Terminal Symbol The symbol in the figure above appears on the 1936/2936 Series Optical Power Meters.

  • Page 22: Control Of Hazardous Substances

    For information about where the user can drop off the waste equipment for recycling, please contact your local Newport Corporation representative. See Section 15 for instructions on how to disassemble the equipment for recycling purposes.
  • Page 23 Safety Precautions  This equipment is grounded through the grounding conductor of the power cord.  Route power cords and other cables so they are not likely to be damaged.  Disconnect power before cleaning the equipment. Do not use liquid or aerosol cleaners;...

  • Page 24: General Cautions

    Safety Precautions 1.2.2 General Cautions Observe these cautions when operating or servicing this equipment:  Before applying power, carefully read the warning label placed over the AC power input receptacle in back of the instrument. Figure 13 AC Receptacle Warning Label ...

  • Page 25: Location Of Warnings

    Safety Precautions Location of Warnings 1.3.1 Rear Panel Electrical Hazard Frame or Chassis Terminal Fuse info MAX Power (1936-R Shown) Figure 14 Locations of warnings on the rear panel...

  • Page 26: General Information

    Additional features such as digital and analog filtering, and data storage of up to 250,000 readings per channel are also offered. Newport’s experience with calibration, together with N.I.S.T. calibration traceability and high precision optical power meters provide users with accurate measurements and exceptional inter-instrument correlation. In R&D,...

  • Page 27: Optical Meter Functionality

    Model 1936-R The model 1936-R optical meter is a 1-channel input optical meter compatible with all Newport detectors having a 15-pin D-sub type connector. All product features and capabilities described herein are included in this model, except a second detector channel.

  • Page 28: Electrical Specifications

    General Information 100/120/220/240VAC 10%, 50/60 Hz, 70 Watts Power: Display: Graphical LCD ¼ VGA, 5.6 in diagonal, TFT color ≥ 20 Hz Display Update Rate: Operating Environment: 5C to 40C; 70% RH non-condensing -20C to 60C; 90% RH non-condensing Storage Environment: 3000m Altitude Installation Category...
  • Page 29 General Information D.C. Voltage Measurement (Thermopile) Signal Range Full-Scale Voltage 2.5mV 25.0 mV 250 mV 2.50 V 25.0 V 130 V 763 μV Resolution 76.3 nV 763 nV 7.63 µV 76.3 µV 3.96 mV Accuracy 0.3% 0.3% 0.3% 0.3% 0.3% 0.3% (Filtered) Accuracy (Maximum...

  • Page 30: Unpacking And Handling

    The instrument bandwidth is determined by the detector used. Please refer to Newport Corporation’s complete offering on detector type. The specified bandwidth is measured from the instrument input (detector) to the Analog Output BNC.

  • Page 31: Available Options And Accessories

    Do not attempt to operate this equipment if there is evidence of shipping damage or you suspect the unit is damaged. Damaged equipment may present additional hazards to you. Contact Newport technical support for advice before attempting to plug in and operate damaged equipment. Available Options and Accessories Newport Corporation also supplies temperature controlled mounts, lenses, and other accessories.

  • Page 32: Power Supplies

    General Information  Set the mains selector tumbler to the voltage that matches the power outlet AC voltage.  Verify the correct rated fuses are installed according to the fuse marking on the rear panel. 2.13 Power Supplies AC power is supplied through the rear panel input power connector that provides in-line transient protection and RF filtering.
  • Page 33 General Information This page is intentionally left blank...

  • Page 34: System Overview

    System Overview Startup Procedure WARNING To avoid electrical shock hazard, connect the instrument to properly earth-grounded, 3-prong receptacles only. Failure to observe this precaution can result in severe injury. Provided that the power meter has been installed in an appropriate environment and its power cord is connected to a working electrical outlet, power-up the power meter by pressing the power button on the lower left corner of the front panel.

  • Page 35: Front Panel Elements

    System Overview 3.2.1 Front Panel Elements On the front panel of the 1936/2936 Series there are the following elements:  A faceplate with an active color liquid crystal display  USB A connector  Power switch  Setup/Enter, and Esc keys ...

  • Page 36: Panel Layout

    System Overview Output Connectors Power meters in the 1936/2936-R series support one analog output for each channel. Analog output enables direct monitoring of a detector through an oscilloscope or voltmeter. On the rear panel there are also trigger outputs, one for each channel. The user can use these outputs to synchronize external equipment with events related to the power meter measurements.

  • Page 37: Figure 17 2936-R Rear Panel Layout

    DC supplies. Too high of an input voltage will cause excessive heating. CAUTION There are no user-serviceable parts inside the power meter. Work performed inside the power meter by persons not authorized by Newport may void the warranty.

  • Page 38: Changing Voltage Settings

    System Overview WARNING To avoid electrical shock hazard, connect the instrument to properly earth-grounded, 3-prong receptacles only. Failure to observe this precaution can result in severe injury. 3.3.3 Changing Voltage Settings The 1936/2936-R Series can operate at several different supply voltages. Before powering up the unit, check the facility AC voltage supply, and select the appropriate setting according to the procedure below.

  • Page 39: Rack Mounting The 1936/2936 Series

    System Overview Rack Mounting the 1936/2936 Series Newport Corporation offers two rack mounting kits for the 1936/2936 Series: PM1-RACK (Figure 18) and PM2-RACK (Figure 19) The PM1-RACK can house one unit from the 1936/2936 Series. In the PM2-RACK two units, either Model 1936 or Model 2936 or one of each, may be mounted side by side.

  • Page 40: Figure 19 Pm2 -Rack Mounting Kit

    System Overview PM2 –RACK mounting kit Figure 19 To mount the units in these racks the user needs to remove the four feet at the bottom of the instrument. With the hardware supplied with the rack mount kits, the bottom of the unit(s) is secured to the bracket using all four original feet mounting positions (Figure 20).

  • Page 41: Figure 20 Mounting Details For The Pm1 -Rack Mounting Kit

    System Overview Mounting details for the PM1 –RACK mounting kit Figure 20...

  • Page 42: System Operation

    System Operation Front Panel Keys The front panel keys are organized in four groups (see Figure 21). Navigation Keys Reconfigurable (also called Soft) Keys Dedicated Keys Escape (ESC) Key Besides these keys, the front panel has a Power switch and a USB connector at the lower left corner of the instrument.

  • Page 43: Setup/Enter Key

    System Operation on the front panel by its circular shape. The power to the unit is OFF when the push button is fully extended and ON when latched. This symbol represents the IN position of the power ON/OFF push button switch This represents the OUT position of the power ON/OFF push button switch...

  • Page 44: Esc Key

    System Operation Figure 25 Measurement Settings screen Refer to Section 4.2 for more information about the measurement settings. 4.1.3 Esc Key The Esc key (Figure 21 and Figure 23) is used to cancel the current action. When in a secondary screen or menu, it will close the current screen or menu and the instrument will return to the main screen (Figure 24).

  • Page 45: Navigation

    System Operation Pressing the Left or Right key of the Navigation and Selection group will make channel B primary and channel A secondary as in Figure 27. 4.1.4.2 Navigation If the instrument is in Setup mode or in any configuration screens, pressing the arrow keys will select different setup modes as displayed by the current screen.

  • Page 46: Range

    System Operation 4.1.6.1 Range Pressing this key reconfigures the Soft keys at the bottom of the screen as in Figure 30. From this screen the user has two options.  One is to toggle Auto/Manual Range mode. This is accomplished by pressing the left-most Soft key.

  • Page 47: Mode

    System Operation 4.1.6.2 Mode The Mode key displays a screen as in Figure 33. Using Navigation/Enter keys, the user can select different measurement modes or display modes according to his application. The ESC key cancels the selection and brings the instrument back to the main screen.

  • Page 48: Lambda (Λ) Key

    System Operation The fourth Soft key is used for filter configuration. When selected, a screen as in Figure 36 is displayed. Using the Navigation/Enter keys the user can select the filter of choice. If the Enter key is not pressed, the ESC key cancels the selection and brings the instrument back to the main screen.

  • Page 49: Set Zero Offset (Zero Key)

    System Operation 4.1.6.6 Set Zero Offset (Zero Key) The Zero Offset key, or short, Zero key is used to temporarily zero the instrument for the measurement in progress. When the user presses this key, the instrument takes the displayed numeric value as offset and subtracts it from all the subsequent measurements.

  • Page 50: Attenuator On/Off

    System Operation The other is to allow the user to change the range. With the Navigation/Selection keys bring the cursor on top of the Range field. Hit the Enter key. A drop-down menu appears with the available ranges in the selected units. Select the desired range and hit Enter. If the unit was in Auto Range mode, once a range is selected here, it will switch the system to Manual Range Mode.

  • Page 51: Mode Selection

    System Operation 4.2.1.6 Mode Selection This setting allows the user to change the measurement mode. The available modes are as follows: Continuous Wave Continuous Run (CW Cont.) Continuous Wave Single Shot (CW Single) Continuous Wave Integral (CW Integ.) Peak-to-Peak Continuous Run (Pk-Pk Cont.) Peak-to-Peak Single Shot (Pk-Pk Single) Pulse Mode Continuous Run (Pulse Cont.) Pulse Mode Single Shot (Pulse Single)

  • Page 52: Trigger Setup

    System Operation Trigger Setup The Trigger Setup screen can be accessed from the Measurement Settings (Figure 41). Pressing the Trigger soft key gives the user a few choices to setup the trigger according to the measurement needs. The user has the option to send a trigger pulse at the Trigger Out BNC connector based on the Trigger In signal.

  • Page 53: Trigger Stop

    The Trigger Stop can also be set with an external command PM:TRIG:STOP (Section 8.3.3). Wavelength Setting Newport detectors have a calibration module or internal memory which stores the Responsivity versus Wavelength Table. If the Lambda key is pressed, a wavelength screen is displayed with the most common values in nanometers (nm) (see Figure 38 on page 48).

  • Page 54: Display Color

    System Operation Display Color In a laboratory environment, and especially when one uses protective eyewear, it may be desirable to change the meter display color to accommodate the eyewear color. The instrument has predefined color schemes that can be changed any time (Figure 43). a.

  • Page 55: Usb Address And Rs232 Parameters

    System Operation Pressing the About soft key will bring a another screen with information about the unit Firmware version, serial number, calibration date. In addition, the attached detectors data is diplayed (Figure 46). From here, one can navigate back to the Measurement Settings or back to the System Settings.

  • Page 56: Graph

    System Operation data and place them in a data buffer on a first-in-first-out (FIFO) basis. The statistics shown are representative of data collected since the time Clear Stats was last pressed. As in Fixed mode, the Clear Stats soft key can be pressed at any time to restart the whole process again.

  • Page 57: Math Functions

    System Operation Math Functions The Math function is displayed on the math field, at the upper right side, just below the secondary channel field (Figure 49). To display the Math field the user selects the soft key labeled Math in the main screen.

  • Page 58: Measurement Correction Settings

    System Operation Measurement Correction Settings The 1936/2936 Series power meters provide users the capability to correct actual measurements taken by it through a “Correction Settings” screen. This screen can be accessed by pressing the “Correction” soft-key in “Measurement Settings” screen (Figure 51). The “Measurement Settings” screen, as described earlier, can be accessed by pressing the Setup key from main measurement screen.

  • Page 59: Display Modes

    System Operation 4.10 4.11 Display Modes The selection of various display modes can be done from the default screen, by pressing the Mode soft key. When the Mode selection screen is displayed (Figure 53), the display mode can be selected from the second column. Figure 53 Mode selection screen 4.11.1...

  • Page 60: Figure 56 Auto Zoom

    System Operation The major ticks represent 10% of the range, and the minor ticks represent 5% of the range. If the Soft key labeled Show Max is selected, the maximum value is retained and displayed in the bar graph with red color. The red bar is updated with each measurement, if the current measured value is larger than the largest of the previous measurements.

  • Page 61: Analog Needle

    System Operation 4.11.3 Analog Needle The Analog Needle displays a vertical marker that moves with the displayed numeric value. It is useful for users who look for a maximum or a minimum when adjusting the optical power. Figure 57 Analog Needle display 4.11.4 Vertical Chart When the Vertical Chart is selected...

  • Page 62: Firmware Upgrade Procedure

    Note that these versions may not be the latest at the time you are performing a firmware upgrade. New firmware files may be available either through the Newport web site (http://www.newport.com) at the product page or through your local Newport...
  • Page 63 System Operation This page is intentionally left blank...

  • Page 64: Performing Basic Measurements

    The 1936/2936 Series sets the measurement to a detector specific default mode depending on the detector used. All Newport detectors have internal logic or calibration modules. Based on the data stored in detectors, the instrument knows to auto configure itself and sets up the mode, range, filter, rate, etc.

  • Page 65: Cw Measurements ( With 918D Or 818P Detectors )

    Performing Basic Measurements Detector Family Mode Continuous CW Single Low- Integrate Power Pk-Pk (918D- Continuous Series) Pk-Pk Single Continuous High- Power CW Single (818P- Series) Integrate Pulse Continuous Energy Pulse (818E- Single Series) Table 1 Available Measurement Modes and Valid Units. The following instructions assume familiarity with the meter’s functions.

  • Page 66: Peak-To-Peak Power Measurements (918D Detectors)

    Performing Basic Measurements This process assumes that the ambient signal is not changing between the time when the Zero key is pressed and when the measurement is made. The user should remember that, if he/she can see the detector active area as he/she moves around, then the detector registers this as a changing ambient DC signal.

  • Page 67: Pulse Energy Measurements (818E Detectors)

    Performing Basic Measurements For single detector, you can obtain a ration, dB or other comparison in reference to a previously saved value. Refer to Section 4.8 for information on setting the reference values. For dual detectors, you can obtain a live ratio or other comparison of the two channels displayed.

  • Page 68: Signal Integration Measurements (918D Or 818P Detectors)

    Performing Basic Measurements pulses. The meter will display the last pulse energy measured until a new pulse arrives. Accurate measurements can be made for pulse repetition rates up to 10 kHz, depending on the limitation of the specific detector in use, of course. Signal Integration Measurements (918D or 818P Detectors) This section describes the procedure for making a basic signal integration...

  • Page 69: Figure 60 Measuring Laser Pulse Energy Via A Thermopile In Cw Integrate Mode

    Performing Basic Measurements Figure 60 Measuring Laser Pulse Energy via a Thermopile in CW Integrate Mode A recommended procedure is: With an 818P High Power Detector connected to the meter, turn the meter on. Set the Mode to CW Continuous. Set the Range to Auto and press the Lambda (λ) key to set the measurement wavelength to the desired value.

  • Page 70: Frequency Measurements (918D Or 818E Detectors)

    Performing Basic Measurements Frequency Measurements (918D or 818E Detectors) The Frequency Measurement in the 1936/2936 Series is a background task. It runs all the time and the user can access it via the Statistics screen (see Section 4.7). Because of this advanced way of measuring the frequency, the user has the convenience to “take a look”...

  • Page 71: Rms Measurements

    Performing Basic Measurements 5.10 RMS Measurements This section describes the procedure for making a basic signal RMS (Root Mean Square) measurement while properly removing the influence of ambient light and other drift effects. The 1936/2936 Series begins and ends the signal RMS every second. With a 918D or 818P Detector connected to the meter, turn the meter on.

  • Page 72: Software Application

    Software Application Overview The 1936/2936 Series have a USB connector on the back of the unit that is used to connect to a computer for use with this application. (RS-232 connection for this application is not supported.) Provided on the CD that comes with the unit is an installation for this software application, it communicates with the 1936/2936 Series using the USB port.

  • Page 73: General Usage

    Software Application General Usage This software application allows the user to setup and monitor the instrument remotely. The controls on the instrument are available in the software in a very easy to read and change format. Figure 62 Application Advanced Options (Configuration Tab) The application is designed to have menus similar to standard Windows applications like MS Word, to ease usability.

  • Page 75: Computer Interfacing

    Computer Interfacing General Guidelines The 1936/2936-R Series power meters have two computer interface ports: USB and RS-232. These communication interfaces can be used to send commands to the power meter from a host PC. The commands supported by the power meter can be divided into the following two categories: commands that cause the power meter to take a desired action, and commands (queries) that return a stored value or state of the power meter.

  • Page 76: Number> Numerical Types

    Computer Interfacing 7.2.5 <number> Numerical Types Numerical parameters are passed and returned as the actual ASCII characters in the string representation of the number. See section 11.2 for more detailed information. 7.2.6 <string> String Types See the section 11.1 for a detailed description of <string>. 7.2.7 Command Termination When the power meter receives a command from the RS-232 port, it...

  • Page 77: Setting Echo Mode From The Keypad

    Computer Interfacing 1936/2936 COMPUTER Figure 63 RS-232 9 Pin to 9-Pin Cable Connections. Cable terminators (RS-232) 7.3.1 Setting Echo Mode From the Keypad The echo mode can be turned ON/OFF from within the menu structure. 7.3.2 Setting Echo Mode via Remote Interface To set the echo mode use the “ECHO”...
  • Page 78 Computer Interfacing This page is intentionally left blank...

  • Page 79: Communication Command Reference

    Communication Command Reference Model 1936/2936 Series Remote Interface Commands A complete listing of the commands supported by 1936/2936-R series power meters is provided below. Command Overview There are two types of commands: commands that cause the power meter to take a desired action, and queries that return a stored value or state of the power meter.

  • Page 80: Activate A Specific Channel

    Communication Command Reference separating 5 queries. The controller responds to this command string with a response that has 5 values using a comma (,) as a separator. COMMAND STRING: PM:P?;PM:ATT?;PM:L?;ERR? INSTRUMENT RESPONSE: 1.2450,1,810,0 8.2.1 Activate a Specific Channel The command set of the power meter, by default, operates on channel A. In case of 2936-R power meter where there are 2 channels, the users can send commands for channel B after selecting this channel through “PM:CHANnel”...
  • Page 81 Communication Command Reference Tree Level Commands/Queries Summary Page Number of Name Function Parameters DISP:BRIGHT Sets the backlight level of the display and the keypad DISP:BRIGHT? NONE Returns the backlight level of the display and the keypad PM:ANALOGFILTER Sets the analog filter to desired value PM: ANALOGFILTER? NONE Returns the analog filter setting...

  • Page 82: Display Commands

    Communication Command Reference Page Number of Name Function Parameters PM:MODE Acquisition mode select PM:MODE? NONE Returns the currently selected acquisition mode. PM:Power? NONE Returns the power in the selected units. PM:PWS? NONE Returns the power with status. Selects the gain stage when making readings with the detector PM:RANge head within a range from 0 to 7 (with zero being the highest gain).

  • Page 83: Disp:bright

    This query will cause the power meter to return an identification string. Remarks Controller Model Firmware Firmware Serial # name version # date NEWPORT XXXX vYYY mm/dd/yy SNZZZZ Examples: NEWPORT 1936-R v1.0.0 12/12/05 SN0001 NEWPORT 2936-R v1.0.0 12/12/05 SN0001 8.3.3.2 *RCL Description Recall Configuration Settings Syntax *RCL bin...

  • Page 84: Sav

    Communication Command Reference Reserved 1 to 5 Valid configuration settings Related Commands: *SAV 8.3.3.3 *SAV Description Save Configuration Settings Syntax *SAV bin Remarks The *SAV command saves the present state of the power meter in its non-volatile flash memory. A particular state is then recalled using the *RCL command.

  • Page 85: Address

    Communication Command Reference 8.3.3.5 ADDRess? Description USB address query. Syntax ADDRess? The ADDRess query returns the power meter’s USB Remarks address. Response Value Description address Reserved 1 to 31 Valid USB address range Related Commands: ADDRess 8.3.3.6 BEEP Description Beep command Syntax BEEP beep set The BEEP command controls the power meter’s beeper.

  • Page 86: Echo

    Communication Command Reference Remarks The ECHO command is used to turn ON or OFF the echoing of commands sent to the power meter over RS-232 communication interface. By default, the echo is turned Response Value Description echo set Echo OFF Echo ON Related Commands: ECHO? 8.3.3.9...

  • Page 87: Pm:analogfilter

    Communication Command Reference Response Type Description Error code, string Error code number and text for error code as"text"per Appendix B, 0 if no errors Related Commands: ERRors? 8.3.3.12 PM:ANALOGFILTER Description Analog filter select command Syntax PM:ANALOGFILTER value Remarks The PM:ANALOGFILTER command selects the analog filter setting.

  • Page 88: Pm:analog:imp

    Communication Command Reference 1 MΩ Related Commands: PM:ANALOG:IMP? 8.3.3.15 PM:ANALOG:IMP? Description Analog output impedance query Syntax PM:ANALOG:IMP? Remarks The PM:ANALOG:IMP? query returns an integer indicating the present analog output impedance. Argument Value Output Impedance 50 Ω Value 100 kΩ 1 MΩ Related Commands: PM:ANALOG:IMP 8.3.3.16 PM:ANALOG:OUT...

  • Page 89: Pm:att

    Communication Command Reference 8.3.3.18 PM:ATT Description Attenuator enable command Syntax PM:ATT enable Remarks Indicates whether or not the attenuator for the 818 Series power detector is on the detector. Argument Type Description Enable Enable use of detector responsivity with attenuator available in the calibration module for 818 detectors.

  • Page 90: Pm:auto

    Communication Command Reference Argument Value Description mode Manual power meter ranging Automatic power meter ranging Related Commands: PM:AUTO?, PM:RANge 8.3.3.22 PM:AUTO? Description Auto range mode query Syntax PM:AUTO? Remarks The PM:AUTO? query returns a value to indicate if auto ranging is enabled or not. Response Value Description...

  • Page 91: Pm:channel

    Communication Command Reference 8.3.3.25 PM:CHANnel Description Select power meter channel Syntax PM:CHAN channel Remarks The PM:CHAN command selects the power meter channel for control. Argument Type Description Channel Power meter channel Related Commands: PM:CHAN? 8.3.3.26 PM:CHANnel? Description Power meter channel query Syntax PM:CHAN? Remarks...

  • Page 92: Pm:corr

    Communication Command Reference 8.3.3.28 PM:CORR? Description Power measurement correction settings query Syntax PM:CORR? Remarks The PM:CORR? command returns the power measurement correction settings. These settings are used by the power meter to correct the actual power measurement. The corrected power is calculated using the formula provided below: Corrected Measurement = ((Actual Measurement * value1) + value2) * value3...

  • Page 93: Pm:digitalfilter

    Communication Command Reference Remarks The PM:DETSN? query returns the serial number of the detector. For example: 0001 Response Type Description serial number string Detector serial number 8.3.3.32 PM:DIGITALFILTER Description Digital filter select command Syntax PM:DIGITALFILTER value Remarks The PM:DIGITALFILTER command specifies the digital filter setting.

  • Page 94: Pm:ds:buffer

    Communication Command Reference 8.3.3.35 PM:DS:BUFfer Description Data Store buffer behavior selection Syntax PM:DS:BUFfer behavior Remarks The PM:DS:BUFfer command selects the behavior mode for control of the Data Store buffer. Argument Value Description Mode Fixed Size Ring Buffer The behavior of the ring buffer is to allow continual data collection after the buffer is full where the oldest values will be overwritten when new measurements are taken.

  • Page 95: Pm:ds:enable

    Communication Command Reference Argument Type Description count The number of measurements that have been collected. 8.3.3.39 PM:DS:ENable Description Enable Data Store Collection Syntax PM:DS:ENable enable Remarks The PM:DS:ENable enables or disables the collection of measurements in the Data Store. Argument Value Description enable Disabled...

  • Page 96: Pm:ds:interval

    Communication Command Reference Note: depending on the number of data points requested, there may be several read operations required on the USB or RS-232 computer interfaces. 8.3.3.42 PM:DS:INTerval Description Data Store Interval Select Syntax PM:DS:INTerval <interval> Parameters The parameter <interval>is of type <number>that is an integer. The parameter represents the rate at which measurements are put in the data buffer.

  • Page 97: Pm:ds:size

    Communication Command Reference Remarks The PM:DS:SAVEBUFFER command saves the current user Data Store for the current channel to a file named PM2936xxx.dat on the WinCE compatible USB Flash Disk plugged into the USB Host port on the front of the Power Meter.

  • Page 98: Pm:filter

    Communication Command Reference Response Value Description units Amps Volts Watts Watts/cm Joules Joules/cm 7-10 Reserved Related Commands: PM:UNITS,PM:UNITS? 8.3.3.48 PM:FILTer Description Filter select command Syntax PM:FILT filter type Remarks The PM:FILT command select the filtering operation to be performed on power readings. Argument Value Description...

  • Page 99: Pm:lambda

    Communication Command Reference Syntax PM:FREQuency? Remarks The PM:FREQuency? query returns a value indicating the present measured frequency in Hertz. 8.3.3.51 PM:Lambda Description Wavelength set command Syntax PM:Lambda value Remarks The PM:Lambda command selects the wavelength to use when calculating power. The value must fall within the calibrated wavelength of the detector.

  • Page 100: Pm:max:power

    Communication Command Reference 8.3.3.54 PM:MAX:Power? Description Maximum power query Syntax PM:MAX:Power? The PM:MAX: Power? returns current range’s maximum Remarks readable power. Response Type Description Power float Power in Watts 8.3.3.55 PM:MIN:Lambda? Description Minimum wavelength query Syntax PM:MIN:Lambda? Remarks The PM:MIN:Lambda? query returns the shortest calibrated wavelength in nanometers.

  • Page 101: Pm:meas:timeout

    Communication Command Reference 2. Auto-ranging in Pulse Continuous mode: The power meter automatically shifts to a lower range once every timeout period when it determines that no pulse measurements could be taken in the existing range. Users must set this timeout value to 250ms or larger than their pulse repetition rate in order to be able to perform measurements accurately.

  • Page 102: Pm:mode

    Communication Command Reference Related Commands: PM:MODE? 8.3.3.60 PM:MODE? Description Acquisition mode query Syntax M:MODE? Remarks The PM:MODE? query returns an integer indicating the present acquisition mode. Response Value Description Mode DC Continuous DC Single Integrate Peak-to-peak Continuous Peak-to-peak Single Pulse Continuous Pulse Single Related Commands: PM:MODE 8.3.3.61...

  • Page 103: Pm:range

    Communication Command Reference Power reading 2 exp Power in present units channel 2 (if present. 0.0 otherwise) Status 2 A bitfield in hexadecimal defining the current channel status NOTE: The bitfield is defined as follows: Bits 9-7 Channel Units. See PM:UNITS? Bits 6-4 Channel Range, See PM:RANge? Bit 3...

  • Page 104: Pm:ref:value

    Communication Command Reference The parameter <val>is of type <number>. Function This command provides a means of directly storing a reference value to be used in linear and logarithmic (dB) relative measurements. The units of this value are the current units being used by the instrument. Related Commands: PM:REF:STOre,PM:REF:VALue? 8.3.3.66 PM:REF:VALue?

  • Page 105: Pm:run

    Communication Command Reference 8.3.3.69 PM:RUN Description Run command Syntax PM:RUN mode Remarks The PM:RUN command disables or enables the acquisition of data. Argument Value Description Mode Stop Related Commands: PM:RUN?, PM:MODE? 8.3.3.70 PM:RUN? Description Run query Syntax PM:RUN? Remarks The PM:RUN? query returns an integer indicating the present run mode.

  • Page 106: Pm:spotsize

    Communication Command Reference Response Type Description Value float saturation current density ( A/cm² ) for semiconductor detector or saturation power ( W ) for thermopile detector. Related Commands: PM:SPOTSIZE, PM:SATLEVEL 8.3.3.73 PM:SPOTSIZE Description Set detector spot size Syntax PM:SPOTSIZE value Remarks This command sets the detector spot size.

  • Page 107: Pm:stat:mean

    Communication Command Reference 8.3.3.76 PM:STAT:MEAN? Description Statistics Mean Value Query Syntax PM:STAT:MEAN? Parameters None Function This query returns the mean or average of all the values in the statistics buffer. Returns <mean> <mean>is of type <number>in exponent notation. 8.3.3.77 PM:STAT:MIN? Description Statistics Minimum Value Query Syntax...

  • Page 108: Pm:temp

    Communication Command Reference 8.3.3.80 PM:Temp? Description 918 detectors temperature query Syntax PM:Temp? Remarks The PM:Temp? query returns the 918 detector's temperature as a float in degrees Celsius. Response Type Description temp float Detector temperature in degrees Celsius (°C) Related Commands: PM:ATT? 8.3.3.81 PM:Temppoll Description...

  • Page 109: Pm:therm:predict

    Communication Command Reference Remarks The PM:THERM:PREDICT command disables or enables the thermopile prediction algorithm. When this algorithm is enabled, the instrument predicts the power measured by thermopile detector very accurately, a few seconds faster than the natural response of the detector. Argument Value Description...

  • Page 110: Pm:trig:edge

    Communication Command Reference Function This query returns a value showing whether the external trigger input is enabled or disabled. Returns <state> <state>is of type <number>that represents the integer 0,if the external trigger input is disabled. If <state> is 1, 2, or 3, the external trigger is enabled on channel A, channel B, or both respectively.

  • Page 111: Pm:trig:holdoff

    Communication Command Reference Syntax PM:TRIG:HOLDoff <time> Parameters The parameter <time>is of type <number> and is an integer from 0 to 1000. <time> is the delay in milliseconds for the trigger to take effect. Function This command sets the delay interval before the trigger takes effect. Related Commands: PM:TRIG: EXTernal, PM:TRIG:EXTernal?, PM:TRIG:HOLDoff? 8.3.3.90...

  • Page 112: Pm:trig:stop

    Communication Command Reference Parameters None Function This query returns the TRIGGER START condition. Related Commands: PM:TRIG: START 8.3.3.93 PM:TRIG:STOP Description This command sets the optional stop event. Syntax PM:TRIG:STOP <option> Parameters The parameter <option> is of type <number> and is an integer from 0 to 6. Argument Value Description...

  • Page 113: Pm:trig:state

    Communication Command Reference Syntax PM:TRIG:STATE <option> Parameters The parameter <option> is of type <number> and is an integer 0 or 1. Argument Value Description option Trigger is armed. The system waits for a trigger start event to occur in order to make a measurement.

  • Page 114: Pm:trig:time

    Communication Command Reference Related Commands: PM:TRIG:STOP 8.3.3.99 PM:TRIG:TIME Description This command sets the time duration that indicates a trigger stop condition. The power meter will stop taking further measurements if the time from trigger start exceeds time duration specified by this command, and if trigger stop option is set to time.

  • Page 115: Pm:units

    Communication Command Reference 8.3.3.102 PM:UNITs? Description Units query Syntax PM:UNITS? Remarks The PM:UNITS? query returns an integer indicating the units selected. Response Value Description units Amps Volts Watts Watts/cm Joules Joules/cm 7-10 Reserved Related Commands: PM:UNITS 8.3.3.103 PM:ZEROSTOre Description Zero value set command Syntax PM:ZEROSTO Remarks...
  • Page 116 Communication Command Reference Syntax PM:ZEROVAL? Remarks The PM:ZEROVAL? query returns the zero value. Response Type Description value float Zero exponent Related Commands: PM:ZEROVAL, PM:ZERO?

  • Page 117: Principles Of Operation

    DC current or voltage, AC peak-to-peak current or pulse voltage, or integrated DC current or voltage signals. This versatility is required to handle the various signals that Newport’s Low Power, High- Power, Energy and other detector families generate. These detector families are based on semiconductor, thermopile, pyroelectric as well as radiometric, photometric and other detectors.

  • Page 118: Digitized Signal Flow

    Principles of Operation The analog signal flow path is primarily determined by the responsivity units of the detector. The numerator of these units indicates how the meter must be configured in order to obtain a calibrated optical measurement. Analog signal flow is independent of whether single or continuous measurements are made.

  • Page 119: Typical Detector Signals

    Principles of Operation Zero Offset Zero offset is active whenever the Offset annunciator is lit. The zero offset output is equal to the input value less the zero reference value. Responsivity Map(s) This process scales the input value in accordance with current calibration wavelength and the responsivity map downloaded from the detector calibration module.

  • Page 120: Thermopile Detector Signals

    Thermopile Signals exhibit 1 to 10 second time constants. Pulse Energy Detector Signals A Newport Energy detector will respond to a single radiant energy pulse with a voltage pulse at its BNC output. This pulse exhibits a sharp voltage rise to a peak followed by a slower voltage decay that “undershoots”...

  • Page 121: Peak-To-Peak (Photodiode) Detector Signals

    Principles of Operation Figure 66 Typical Newport Energy Detector Signal Waveform An energy detector signal sharply rises to a peak value and then decays going somewhat negative before finally returning to zero. The energy in the radiant pulse is proportional to the height of the peak measured from immediately before the sharp rise.

  • Page 122: Integration Of Detector Signals

    Principles of Operation Figure 68 Time Varying Signal Measurements. Many different measurements can be made on different portions of a time varying signal. The most common are: DC power, peak power, and peak-to-peak power. Integration of Detector Signals The 1936/2936 Series provides for making measurements that integrate incoming power detector signals to obtain an energy via the CW Integrate mode.

  • Page 123: Analog Output

    Principles of Operation Two common applications are natural extensions of the CW Integrate measurement mode: Pulse laser energy measurement using a thermopile detector Energy from exposure over a period of time (dosage)  Figure 70 Measuring Laser Pulse Energy with a Thermopile. Thermopiles are often used to measure pulsed laser energy by integrating the response of the detector to the pulse.

  • Page 124: Measurement Considerations

    9.10.1 Detector Calibration and Accuracy Newport Corporation calibrates its detectors using secondary standards directly traceable to the United States National Institute of Science and Technology (NIST), National Research Council (NRC) of Canada, or to Great Britain’s National Physical Laboratory (NPL).

  • Page 125: Thermopile Detector Temperature Effects

    The 1936/2936 Series of optical power meters can measure the detector temperature and correct the power readings accordingly. The power correction happens automatically only for those detectors which are equipped with a thermistor (Newport offers detectors with thermistors for temperature compensation. See Newport web-site www.newport.com for more details.)

  • Page 126: Energy Detector Temperature Effects

    Other techniques to reduce stray light include using apertures, placing detector in a box or other housing to shield the surface from light ( or air currents when using Newport’s High-Power disk thermopile detectors ) which is not coming from the source, and turning off room and other light.

  • Page 127: Signal Filtering

    Principles of Operation 9.10.6 Signal Filtering The 1936/2936 Series offer the user the option to filter the detector signal. There are two programmable filters that can be used individually or together to condition the detector signal: the Analog Filter and the Digital Filter. The Analog Filter is hardware based programmable low-pass filer.

  • Page 128: Common Measurement Errors

    Principles of Operation When the system performs frequency measurements the analog filter is ignored. 9.11 Common Measurement Errors The most common sources of optical measurement error are listed in Table 6 below. Other common errors are discussed in the preceding subsections of Measurement Considerations.
  • Page 129 Principles of Operation This page is intentionally left blank...

  • Page 130: Maintenance And Service

    Optical Power Meters. Work performed by persons not authorized by Newport Corporation will void the warranty. Calibration accuracy is warranted for a period of 1 year. After 1 year, the unit should be returned to Newport Corporation for recalibration and NIST trace ability re-certification. 10.1...

  • Page 131: Obtaining Service

     Instrument serial number (on rear panel)  Description of the problem. If the instrument is to be returned to Newport Corporation, you will be given a Return Number, which you should reference in your shipping documents. Please fill out a copy of the service form, located on the following page, and have the information ready when contacting Newport Corporation.

  • Page 132: Service Form

    Maintenance and Service 10.4 Service Form Newport Corporation U.S.A. Office: 800-222-6440 FAX: 949/253-1479 Name _______________________________ Return Authorization #__________________ (Please obtain RA# prior to return of item) Company ________________________________________________________________________ (Please obtain RA # prior to return of item) Address ________________________________ ____________________Date _________________ Country _______________________ Phone Number ______________________________________ P.O.
  • Page 133 Maintenance and Service This page is intentionally left blank...

  • Page 134: Appendix A - Syntax And Definitions

    Appendix A – Syntax and Definitions 11.1 Definition of <string> For convenience, the 1936/2936 Series recognizes double quoted, single quoted, and unquoted strings with certain restrictions as detailed below. Any of these forms may be used where a <string> parameter is required. “this is a string”...

  • Page 135: Definition Of

    Appendix A All strings using this format must start with an alphabetic character (A through Z, a through z). All other characters must be either alphabetic, digit (0 through 9)or the ‘_’ character. Any other character will delimit the string. Some examples are shown below: Sent: this is a string Interpreted: this...
  • Page 136 Appendix A Any of the following characters, as the first character of an ASCII sequence, indicates that a number is being defined: +-.0 1 2 3 4 5 6 7 8 9 A floating point number is defined as follows: 1.
  • Page 137 Appendix A Example: All numbers below represent the decimal value 129. #B10000001 #b010000001 #b10000001 3. <number> defined as octal. The 1936/2936 Series recognizes unsigned octal numbers in the range 0 to 65535 decimal, or 0 to 177777 octal. Octal numbers are represented using digits from 0 to 7.An octal number has the following format: #Q<octal>...

  • Page 138: Appendix B - Error Messages

    Appendix B – Error Messages 12.1 Introduction When using the RS-232 port the RS-232 Echo Mode controls when errors are returned. When the Echo Mode is enabled the errors are returned immediately. When the Echo Mode is disabled the errors are not returned immediately and the *ERR? or ERRSTR? commands must be used to retrieve the errors.

  • Page 139: Execution Errors

    Appendix B  Missing or too many parameters. The above list in not exhaustive but does give the basic idea of what to look for. 126, Too Many Or Few Arguments Generated when command arguments are missing or too many. 12.3 Execution Errors Execution Errors are associated with the interpretation of the converted...

  • Page 140: Device Errors

    Appendix B This error is generated if the command in the input buffer is too large to fit into the available space in the parser buffer. It is usually generated when commands are sent to the instrument faster than it can process. Parser buffer is 2,048 characters long.
  • Page 141 Appendix B This page is intentionally left blank...

  • Page 142: Appendix C - Legacy Commands Reference

    Appendix C - Legacy Commands Reference Number of Legacy Name Function Parameters Commands DISP:BRIGHT Sets the backlight level of the display and the keypad DISP:BRIGHT? NONE Returns the backlight level of the display and the keypad DISP:SCReen Switches to the n - screen display. Returns displayed screen number, 0 –...

  • Page 143: Table 7 Legacy Commands Reference

    Preface Number of Legacy Name Function Parameters Commands Returns the longest calibrated wavelength in PM:MAX:Lambda? NONE nanometers. Returns current range’s maximum readable power. PM:MAX:Power? NONE Returns the shortest calibrated wavelength in PM:MIN:Lambda? NONE nanometers. PM:MODE MODE_n PM:MODE? NONE Returns the currently selected acquisition mode. MODE_n? PM:Power? NONE...

  • Page 144: Appendix D - Sample Programs

    Appendix D – Sample Programs 14.1 Programming Samples The CD will install some simple programming samples to get computer interfacing started. These are minimal samples and provided only for reference. 14.2 LabVIEW LabVIEW programming samples separated in folders based on version of LabVIEW compiled with.
  • Page 145 Preface This page is intentionally left blank...

  • Page 146: Appendix E - Disassembly Instructions

    These disassembly instructions are intended only for recycling at the end of the product lifetime. For troubleshooting or servicing, users should contact the local Newport Corporation representative. There are no user serviceable parts inside the equipment. Attempting to self-service the unit will void the warranty.

  • Page 147: Figure 72 Disassembled 1936/2936 Model

    Cover PCB 2 PCB 1 Rear Panel PCB 4 PCB 3 Front Panel Enclosure Figure 72 Disassembled 1936/2936 model...
  • Page 148 Restricted Functionality. You are licensed to use the SOFTWARE to provide only the limited functionality (specific tasks or processes) for which the DEVICE has been designed and marketed by Newport. This license specifically prohibits any other use of the software programs or functions, or inclusion of additional software programs or functions that do not directly support the limited functionality on the DEVICE.
  • Page 149 To be valid, the label must be affixed to the DEVICE, or appear on Newport’s software packaging. If you receive the label separately other than from Newport, it is invalid. You should keep the label on the DEVICE or packaging to prove that you are licensed to use the SOFTWARE.
  • Page 150 Newport Corporation Worldwide Headquarters 1791 Deere Avenue Irvine, CA 92606 (In U.S.): 800-222-6440 Tel: 949-863-3144 Fax: 949-253-1680 Internet: sales@newport.com Visit Newport Online at: www.newport.com...

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